Microsoft Security Advisory MS03-046 – A denial of service condition exists in Exchange Server 5.5 that can be exploited by a remote attacker and Exchange 2000 Server suffers the same denial of service and a buffer overrun that can result in an attacker running malicious programs.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/31827/ms03-046
Source: https://packetstormsecurity.com/files/31827/ms03-046.html